Mammary gland hyperplasia is the most common breast disease in women, mainly manifested as breast lumps and breast pain. In recent years, the incidence has been increasing year by year, and the age is getting younger and younger. When it comes to breast enlargement, many women naturally think of endocrine disorders, emotions and other reasons, but what many people do not know is that excessive use of estrogen-containing health products can also lead to breast enlargement. Health supplements are short for health food products, which have the common characteristics of general food products and can regulate the functions of the human body and are suitable for specific groups of people, but not for the purpose of curing diseases. Estrogen is mainly produced by the ovaries and placenta, and in addition to preventing and treating diseases, it can also enhance breast size, beauty and treat acne. In recent years, many estrogen-based health products have appeared on the market for improving menopausal symptoms and for beauty, delaying aging and maintaining youth. Because most people have a wrong or unsound understanding of the selection and understanding of health products, many women follow these products blindly. It is important to note that these products are not suitable for all people, and improper application can lead to female endocrine disorders. Once the hormone secretion in a woman’s body is out of balance and too much estrogen is secreted, the epithelial cells of the breast ducts will change from normal development to abnormal proliferation under the stimulation of estrogen, and may even become cancerous. Therefore, before taking health products, women should test their body estrogen levels and avoid taking them if their own estrogen levels are high; at the same time, menopausal women who are relieving aging through estrogen replacement therapy should take them under the guidance of a professional doctor and should also have regular breast examinations to prevent mammary gland hyperplasia from becoming malignant.